Sectional conduit



- DAVID D. TRACY, OF JACKSON, MICHIGAN.

SECTIONAL CONDUIT.

' Application led July 17,

To )clim/'i if may concern.:

lie it known that l. DAvn) D. Timer, a citizen ot' the lnited States. residing at- Jachson. county ot' Jackson, and State ot Michigan. have invented certain new and uset'ul Improvements in Sectional Conduits,

ot' which the following is a specification.

This invention relates' to improvements in sectional conduits.

`My improvements relate particularly to the joints t'or sectional conduits and are particularljv designed for use in concrete conduits for gas. sewer. water and other purposes. and are Well adapted as conduits tor iinids under pressure.

The main object ot this invention is to provide an improved joint t'or sectional conduit which enables the rapid laying of the conduit and one whichmay be readily made gas and Water tight. A

Further objects. and objects relating to structural details. ivill definitely appear from the detailed description to Jfollovv.

I accomplish the objects of my invention ,by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification.y in which:

Figure I is an end vie\v ot a conduit embodying the features ot my invention.

Fig. H is an enlarged detail longitudinal section on a line corresponding to line 2 2 ot' Fig. l. the coupling bars being shown in iull lines.

Fig. IH is adetail top view.

Fig. IY is an enlarged detail section on a line corresponding to line i of Figli.

In the drawing similar reference characters refer to similar parts throughout. the several views.

ln the accompanying drawing. I have not attempted to maintain the relative proportions ot' the parts which might 'be desirable in practice. that the thickness of the ivalls ielativc to their other' dimensions and. t'urther. these j'noportions ivill be varied according to the various requirements and conditions ot installation and the particular purpose for which the conduit is intended.

The conduit sections l are formed ot concrete and have abutting ends Q. The oonduit sections have stepped externally regis- Sipeeicatimi of Letters Patent.. Patented NOV. 8, 1921.

1920. Serial No. 397.028.

tering grooves 3 embracing substantially the upper halves'thcreot and stepped internally registering grooves l embracing substantially the lower halves thereof, thus providing a shouldered externalv joint having an internal portion 5 and a wider external portion (land an internal shouldered joint channel havingan inner portion T and a wider outer portion.'

The ends of the inner portions of the channels are connected. providing a continuous inner groove. T he ends 10 and 11 are lflush Yand abut.

Coupling bars l2 are embedded in the sections \vith their ends projecting into the outer portions ot the channels and terminating in hooks 13 open at their sides so that the hooks may be engaged by the lat- -eral movement ot the-conduit sections when their ends are in abutting relation. all the hooks bein-g faced or positioned in the-same relation so that they are all .simultaneously engaged.

The inner portions 5 and T of the channels are preferably provided with a coating H ot' tar or asphaltum and are filled or calked with a-fibrous material 15' such as hempproviding a continuous callted joint.

The. outerportions G and 8 of the joints are then filled ivith cement 16. The side walls ot' these channels are indicated.

lith the parts thus arranged my improved conduit sections may be quickly laid. it only being necessary7 to abut the ends and shift. them laterally to engage the hooks.

The 4joint channels are openfor calking.

or filling and when filled the coupling bars are embedded so that they cannot open.

Mv improved conduit is, aS stated. adapted for gas and ivater under heavy pressure and onaccount of the economy in manufac- `ture and'cenveniencc in laying the saine is very desirable for general use.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent. is:

1. -i sectional conduit comprising tubular 4sections having abutting ends With stepped external.registering grooves in their upper portion and stepped internal registering grooves in their lower portions providing a. shouldered external joint channel embracing substantially the upper half of thesections and a shouldered internal joint channel einbracing substantially the lower half thereof,

preferablyinclined as land disposed so thatthe hooks may be simultaneously engaged by a lateralniov'ement of the sections withtheirends in abutting` rela-.

tion? a packing of fibrous material for the inner portions of said channels,` the wallsof the inner 'portions of said channels being coated with av waterproof` material, and a. cement filling for the outer portions of vsaid channels'embedding the engaged'hooks. 25A sectional conduit comprising 'tubular sections having abuttingV ends with stepped external registering grooves in their upper portionand stepped" internal registering grooves iny their lower portions lproviding a 'shoi'ildered external' joint channell em'lorac;

ing substantially the upper halt` of the section and a shouldered internal-joint channel embracing substantially the lower half thereof, coupling bars embedded in said conduit sections' and projecting at the ends thereof into the outer portions of said channels and terminating in rearwardly turned coacting hooks open at their sides and disposed so that the hooks may be simultaneously enl raged h fY a lateral movement of the sections with their ends in abutting'relation, a Calkingr for the inner portions of said channels` and a cement filling forthe outer portions'ot said Channels embedding said engaged hooks.

In witness whereof I have hereunto set. my hand and witnesses.

-DAVID DQTRACY.- A[n 5.]

"Witnesses: I.

GEORGE E. BAILEY, JosnrH W. EATON.

seal in the presence of two 

